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引用次数: 0
摘要
目的 本研究旨在探讨沉头铆钉头部尺寸对 2024-T3 合金铆接试样疲劳性能的影响。设计/方法/途径 通过有限元法和疲劳试验研究了铆钉头部尺寸与疲劳行为之间的关系。研究结果铆钉头尺寸的改变会引起应力集中和残余法向应力的变化，铆钉孔附近的应力集中会使疲劳裂纹源位于沉头铆钉孔的直段上，而残余法向应力能有效抑制疲劳裂纹的产生和扩展。疲劳循环会使铆钉孔产生不同程度的表面磨损。原创性/价值铆钉头高度为 2.28 mm 和 2.00 mm 的试样的疲劳寿命相近，但铆钉头高度为 1.72 mm 的试样的疲劳寿命远高于其他试样。
Effect of the countersunk rivet head dimensions on fatigue behavior of riveted specimens of 2024-T3 alloy
Purpose
This study aims to investigate the effect of countersunk rivet head dimensions on the fatigue performance of the riveted specimens of 2024-T3 alloy.
Design/methodology/approach
The relationship between rivet head dimensions and fatigue behavior was investigated by finite element method and fatigue test. The fatigue fracture of the specimens was analyzed by scanning electron microscopy.
Findings
A change of the rivet head dimensions will cause a change in the stress concentration and residual normal stress, the stress concentration near the rivet hole causes the fatigue crack source to be located on the straight section of the countersunk rivet hole and the residual normal stress can effectively restrain the initiation and expansion of fatigue cracks. The fatigue cycle will cause the rivet holes to produce different degrees of surface wear.
Originality/value
The fatigue life of the specimens with the height of the rivet head of 2.28 mm and 2.00 mm are similar, but the specimens with the height of the rivet head of 1.72 mm were far higher than the other specimens.
期刊介绍：
Aircraft Engineering and Aerospace Technology provides a broad coverage of the materials and techniques employed in the aircraft and aerospace industry. Its international perspectives allow readers to keep up to date with current thinking and developments in critical areas such as coping with increasingly overcrowded airways, the development of new materials, recent breakthroughs in navigation technology - and more.
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